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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 575830Generated: October 28, 2026

Ammonium Chloride → HCID 19918473, compound

https://huagongshe.com/reaction/575830

Reaction equation

Participants

RoleNameHCIDCharge
ReactantAmmonium ChlorideHCID 25517—
Reactant3,4-dihydro-2H-chromen-2-ylmethyl trifluoromethanesulfonateHCID 19606358—
ReactantHCID 178418689HCID 178418689—
SolventWaterHCID 962—
SolventTetrahydrofuranHCID 8028—
ProductHCID 19918473HCID 1991847390%

Reaction Steps

MeMgBr (45.6 mL, 137 mmol, 3M in ether) was added to a mixture of the title compound from Step 2 (13.5 g, 45.6 mmol) and CuBr-Me2S (1.61 g, 7.74 mmol) in THF (150 mL) at −5° C. The reactions was stirred at rt for 2 h. It was then poured onto a solution of NH4Cl (55 g, 1.04 mol) in water (200 mL) and extracted with DCM (3×150 mL). The organic layer was dried over Na2SO4, filtered and concentrated under reduced pressure to give the title compound (6.66 g, 90%) as a brown oil. 1H NMR (400 MHz, CDCl3): δ 7.09-7.02 (m, 2H), 6.82-6.78 (m, 2H), 3.93-3.87 (m, 1H), 2.84-2.72 (m, 2H), 2.02-1.96 (m, 1H), 1.81-1.61 (m, 3H), 1.04 (t, J=7.2 Hz, 3H).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS09034900B2
Source datasetuspto-grants-2015_05
ORD IDord-56c275f794d14dd785827882de6da33b
Source noteuspto-grants-2015_05